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base / profiler / sample_metadata.cc [blame]
// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/profiler/sample_metadata.h"
#include <optional>
#include <string_view>
#include "base/metrics/metrics_hashes.h"
#include "base/no_destructor.h"
#include "base/profiler/stack_sampling_profiler.h"
#include "base/threading/thread_local.h"
namespace base {
namespace {
std::optional<PlatformThreadId> GetPlatformThreadIdForScope(
SampleMetadataScope scope) {
if (scope == SampleMetadataScope::kProcess)
return std::nullopt;
return PlatformThread::CurrentId();
}
} // namespace
SampleMetadata::SampleMetadata(std::string_view name, SampleMetadataScope scope)
: name_hash_(HashMetricName(name)), scope_(scope) {}
void SampleMetadata::Set(int64_t value) {
GetSampleMetadataRecorder()->Set(name_hash_, std::nullopt,
GetPlatformThreadIdForScope(scope_), value);
}
void SampleMetadata::Set(int64_t key, int64_t value) {
GetSampleMetadataRecorder()->Set(name_hash_, key,
GetPlatformThreadIdForScope(scope_), value);
}
void SampleMetadata::Remove() {
GetSampleMetadataRecorder()->Remove(name_hash_, std::nullopt,
GetPlatformThreadIdForScope(scope_));
}
void SampleMetadata::Remove(int64_t key) {
GetSampleMetadataRecorder()->Remove(name_hash_, key,
GetPlatformThreadIdForScope(scope_));
}
ScopedSampleMetadata::ScopedSampleMetadata(std::string_view name,
int64_t value,
SampleMetadataScope scope)
: name_hash_(HashMetricName(name)),
thread_id_(GetPlatformThreadIdForScope(scope)) {
GetSampleMetadataRecorder()->Set(name_hash_, std::nullopt, thread_id_, value);
}
ScopedSampleMetadata::ScopedSampleMetadata(std::string_view name,
int64_t key,
int64_t value,
SampleMetadataScope scope)
: name_hash_(HashMetricName(name)),
key_(key),
thread_id_(GetPlatformThreadIdForScope(scope)) {
GetSampleMetadataRecorder()->Set(name_hash_, key, thread_id_, value);
}
ScopedSampleMetadata::~ScopedSampleMetadata() {
GetSampleMetadataRecorder()->Remove(name_hash_, key_, thread_id_);
}
// This function is friended by StackSamplingProfiler so must live directly in
// the base namespace.
void ApplyMetadataToPastSamplesImpl(TimeTicks period_start,
TimeTicks period_end,
uint64_t name_hash,
std::optional<int64_t> key,
int64_t value,
std::optional<PlatformThreadId> thread_id) {
StackSamplingProfiler::ApplyMetadataToPastSamples(
period_start, period_end, name_hash, key, value, thread_id);
}
void ApplyMetadataToPastSamples(TimeTicks period_start,
TimeTicks period_end,
std::string_view name,
int64_t value,
SampleMetadataScope scope) {
return ApplyMetadataToPastSamplesImpl(
period_start, period_end, HashMetricName(name), std::nullopt, value,
GetPlatformThreadIdForScope(scope));
}
void ApplyMetadataToPastSamples(TimeTicks period_start,
TimeTicks period_end,
std::string_view name,
int64_t key,
int64_t value,
SampleMetadataScope scope) {
return ApplyMetadataToPastSamplesImpl(period_start, period_end,
HashMetricName(name), key, value,
GetPlatformThreadIdForScope(scope));
}
void AddProfileMetadataImpl(uint64_t name_hash,
int64_t key,
int64_t value,
std::optional<PlatformThreadId> thread_id) {
StackSamplingProfiler::AddProfileMetadata(name_hash, key, value, thread_id);
}
void AddProfileMetadata(std::string_view name,
int64_t key,
int64_t value,
SampleMetadataScope scope) {
return AddProfileMetadataImpl(HashMetricName(name), key, value,
GetPlatformThreadIdForScope(scope));
}
MetadataRecorder* GetSampleMetadataRecorder() {
static NoDestructor<MetadataRecorder> instance;
return instance.get();
}
} // namespace base